The Tanita RD-545 HR Bluetooth segmental body composition monitor is designed with advanced technology previously accessible only to personal trainers & dietitians. The scale provides accurate measurement of each limb & torso individually to ensure you have control over your fitness by knowing your body's needs. The monitor measures your muscle mass, bone mass, & visceral fat while rating your physique for future reference & improvement. The device also has a guest mode in case other users might want to check out their BMI. in addition, the device is compatible with the My Tanita app which can store more than 12 measurements allowing you to check the progress of your journey on a tablet or smartphone easily.